Elves, dwarves, and humans once walked this land and built on it. For the past eight hundred years, no sapient being has disturbed the ruins.
That seems to be about it in terms of buildings intact enough to explore; there are plenty of those parrots around and a fat fuzzy mammal nosing around in the dirt under some bushes, but nothing that promises more loot.
From the air she notices that the main streets of Tisfaat were laid out in the shape of a stick-figure human, but that's the oddest thing she encounters on her way back to Mechuria City. The boat is still where it was, but the explorers aren't on it right at this moment.
If she makes a second pass over the city she'll spot them coming out of another ruin south of the river.
"Hi! I found some stuff. I didn't bring it all, it'd have been awkward to carry." She lays out the stuff. "I think this is the only magic one, there were a couple other magic things too though. Also some writing I memorized, and -" She displays the wall art she copied onto her skin.
"That is a really neat trick!" Tem says of her art skin. "I can copy that while you write down the writing you memorized, if that works for you."
He hands her some paper and a fountain pen, and starts sketching her wall art with a piece of charcoal. He's a pretty decent sketch artist, though of course he can't do color.
Once she's done he wants to know where she saw each piece of it and annotates it as such. He confirms that the stuff from that one classroom was algebra, and the other classroom was apparently doing a grammar lesson.
She marks things out on a map and mentions the other magic things she saw, including the sphere of emptiness under the water.
The description of the sphere of emptiness sparks a heated debate between the explorers; Tem and Derron think it was being generated by an artifact on the lake bottom and Chaenath suspects some animal's defense mechanism.
This statement does not support either side of the debate more than the other; eventually they all conclude that they don't have enough evidence to conclude anything. Chaenath starts taking notes on the preserved butterfly while Tem examines the metal rod.
Cayra goes through all the things she saw, even things that didn't seem particularly interesting to her at the time in case knowing more matters.
Tem twists the twisty bit of the rod while saying "I wonder what happens if I turn it all the way clockwise--woah, it makes my voice louder!" It does, in fact, make his voice louder, though some of the sound seems to be coming from the rod rather than from his mouth.
"Yeah, it's some kind of--okay that's actually kind of annoying. Try talking into it while I'm holding it and then when you're holding it, I want to see if it goes by proximity or touch." He turns it back on and holds it out to her silently.
Her voice starts being amplified when she starts touching it!
"Yeah, I'm trying to find that out by not letting it charge off me." Tem says after letting go of it. "We can run it down and then charge it back up again."
"From your description, probably just because it was shiny. There are tales of various kinds intelligent species passed down through the years, but most of them sound like fiction and none of them sound like what you saw."